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I sure like it, but then I only use it properly.:drinks:Since when would 24 gr of IMR 4198 and 3/4 gr of fluffed up dacron be improper use, cause that is the load depositing melted dacron on the case necks of 8mm.

Oh ya it can and does melt upon firing, I find it often melted around the very end of the neck, hard and can be scraped off by fingernail. Most recently with 24.0 Grs IMR 4198 and .8 gr dacron. I have never used dacron with any powders with a burn...

I have found it burned around the very end of the neck, and yes I have had it blow back into my face when shooting into the wind, so I don't think it is all consumed, but most times no not on the ground in front of the bench.

Absolutely the base of the bullet has to make the trip from the expanding neck then through the throat and finally engraved by the rifling, so once inside the bore if no blow by of gases of course there will not be leading, we're talking about what...

Yes that is what I stated, pressure up-velocity up. My thought is dacron is doing something similar too BPI buffer but without all the friction in case transition from body to neck. I think it is sealing the bore, kind of a gas check under the gas...

Like I say, I think it has to do with the powder itself, ie harder to ignite ball powders v easier to ignite ball or extruded. Now I never said all ball powders or all extruded powders, heck there are ball powders with NO deterrent coating. I don't...

OK but what is increasing the velocity, it has to be pressure increase, that's how it works increase pressure increase velocity. The not enough "mass" argument doesn't work for me simply because PSB or BPI ORG to be more exact rivals dacron for...

Maybe, maybe not. I think it depends on the powder, especially ball powders where positioning it before firing is not enough but holding it in that position with dacron does increase pressure. 8x57 with 250 gr cast and 35.0 gr WC846 positioned no...